package demo4.mapper;

import demo4.pojo.User;
import demo4.util.DBUtil;
import demo4.util.IDBUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.print.DocFlavor;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

@Component
public class UserMapper implements IUserMapper{
    @Autowired
    private IDBUtil dbUtil;

    @Override
    public int insert(User user) {
        try (Connection conn = dbUtil.getConnection();){
            String sql = "INSERT INTO user(username,password,nickname,age) VALUES(?,?,?,?)";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1, user.getUsername());
            ps.setString(2, user.getPassword());
            ps.setString(3, user.getNickname());
            ps.setInt(4, user.getAge());
            return ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }

    @Override
    public User selectByUsernameAndPassword(String username, String password) {
        try (Connection conn = dbUtil.getConnection();){
            String sql = "SELECT * FROM user WHERE username = ? AND password = ?";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1, username);
            ps.setString(2, password);
            ResultSet rs = ps.executeQuery();
            if (rs.next()) {
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setNickname(rs.getString("nickname"));
                user.setAge(rs.getInt("age"));
                return user;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public User selectByUsername(String username) {
        try(Connection conn = dbUtil.getConnection()){
            String sql = "SELECT id,username,password,nickname,age FROM user WHERE username = ?";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1, username);
            ResultSet rs = ps.executeQuery();
            if(rs.next()){
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setNickname(rs.getString("nickname"));
                user.setAge(rs.getInt("age"));
                return user;
            }
        }catch (SQLException e){
            e.printStackTrace();
        }
        return null;
    }


    @Override
    public List<User> selectAll() {
        List<User> list = new ArrayList<>();
        try (Connection conn = dbUtil.getConnection();){
            String sql = "SELECT id,username,password,nickname,age FROM user";
            PreparedStatement ps = conn.prepareStatement(sql);
            ResultSet rs = ps.executeQuery();
            while (rs.next()) {
                User user = new User();
                user.setId(rs.getInt("id"));
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("password"));
                user.setNickname(rs.getString("nickname"));
                user.setAge(rs.getInt("age"));
                list.add(user);
            }
            return list;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return  null;
    }

    @Override
    public int update(User user) {
        try (Connection conn = dbUtil.getConnection();){
            String sql = "UPDATE user SET password = ?,nickname = ?,age = ? WHERE username = ?";
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1,user.getPassword());
            ps.setString(2,user.getNickname());
            ps.setInt(3,user.getAge());
            ps.setString(4,user.getUsername());
            return ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return 0;
    }

}
